<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>01-表格隔行变色</title>
    <style>
        table {
            width : 800px;
            margin : 100px auto;
            text-align: center;
            border-collapse: collapse;
            font-size: 14px;
        }

        thead tr {
            height: 30px;
            background-color: skyblue;
        }

        tbody tr {
            height:30px;
        }

        tbody td {
            border-bottom: 1px solid #d7d7d7;
            font-size:12px;
            color:blue;
        }

        .bg{
            background-color: yellowgreen;
        }
    </style>
</head>
<body>
    <table>
        <thead>
            <tr>
                <th>代码</th>
                <th>名称</th>
                <th>最新公布净值</th>
                <th>累计净值</th>
                <th>前单位净值</th>
                <th>净值增长率</th> 
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td> 
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
            <tr>
                <td>003526</td>
                <td>农银金穗3个月定期开放债券</td>
                <td>1.075</td>
                <td>1.079</td>
                <td>1.074</td>
                <td>+0.047%</td>
            </tr>
        </tbody>
    </table>
    <script>
        /* 
            需求：
                1. 鼠标进入tr,tr添加class  bg
                2. 鼠标离开tr,tr的class 清空
        */
       let trs = document.querySelectorAll('tr');
       for(let i = 0; i<trs.length; i++){
            trs[i].onmouseenter = function(){
                this.className = 'bg';
            }
            trs[i].onmouseleave = function(){
                this.className = '';
            }
        }
    </script>
</body>
</html>